The brass is an alloy of
gold and copper
silver and zinc
copper and zinc
copper and aluminium
C.
copper and zinc
Brass is an alloy of copper and zinc. It contains 70% copper and 30% zinc.
In the metallurgy of which of the following cupellation process is used?
Copper
Silver
Iron
Aluminium
Cryolite is used in the electrolytic extraction of aluminium
to obtained more alumimium
to decompose bauxite
to protect anodes
as a reducing agents
The common method of extraction of metals from oxide ores is
reduction with carbon
reduction with hydrogen
reduction with aluminium
electrolytic method